(Pocket-lint) - Microsoft's Surface Book 3 is now on sale in both the US and UK.

The Surface Book 3 13-inch starts from $1,599/£1,599 and the Surface Book 3 15-inch is available from $2,199/£2,199, which makes them more expensive in the UK than US. Both products are available to purchase from the Microsoft Store and selected major retailers. 

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As with previous Surface Books, the new laptop is designed for performance - as well as latest 10th generation Core processors, you can also specify up to Nvidia Quadro RTX graphics.

Battery life is also impressive, with up to 17.5 hours on the 15-inch model and 15.5 hours on the 13-inch version. 

Microsoft said at the time of the Surface Book 3's launch that the new laptop - which once again features a screen you can detach as a separate Windows tablet - claims it's 50 per cent more powerful than Surface Book 2 depending on the configuration. 

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Storage ranges from 256GB up to 1TB, while the 15-inch also has a (super expensive) 2TB option.

The 13 and 15-inch pin-sharp PixelSense displays are joined by fast SSDs - Microsoft says it's "the fastest SSD we've ever shipped". However, frustratingly there's no Thunderbolt 3 support. 

The also recently announced Surface Headphones 2 are also now available to buy for $250/£240 in Matte Black and Light Grey.  

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Writing by Dan Grabham.